Air-valve.



Q's-(a C. H. PETERSON.

AIR VALVE.

APPLICATION FILED FEB.21,1918.

1,109,174, Patented Sept. 1, 1914.

[lave/0601': a f C. K1 6661190 s. Tovall whom it may concern.

CARL H. PETERSON; or HARTFORD, coivNEc'rIcU-r AIR-VALVE.

Be it known that I, CARL H. Pernnson, a

1 subject of the King of Sweden, residing at Hartford, in the county ofHartford and v State of Connecticut, have invented "certain new anduseful Improvements inAir-Valves,

of which the following is a specification.

This invention relates to what is known as "an,air valve 'or a structureavhich is associated with radiators forming part of heating systems andby which the'cold-air in theradiator can escapeitherefroln when" necessary, but which shut ofi'the steam, among the principal objects of theinvention being the provision of an article of "tlllS character which issimple in'eonstruction and positive and certain and wholly automatic. inaction.

Said valve possesses other features of novcity and advantage whichwiththe foregoing will be stated at length the follow- "ing descriptionwherein I will set forth in full that one of the several forms of em-'bodiment.' of th invention-which I have selected for illustration. inthe dmwin'gs accompanyingan'd forming part of tl1e,-pres-= entSpecification. 1 do not limit myself this disclosure; I maydeparttherefrom inseveral particulars within the scopeof the inventiondefined by the claims-following said description. 1

Referring to said drawings; Figure 1 is a vertical sectional view of anair valve. involving my invention. Fig. 2 is a; horizontel sectionalview of the same on the line 92 of Fig. 1. Fig.3 is a perspectiv eviewof an expansible and contractiblezmember and a clamping membercooperative there- .50 which will be hereinafter'sim'plyrefcrred towith, and, Fig. 4 is a detail view in plan (if a spring. i Likecharacters refer to like parts throughout the several views. 7 I a l Thedifferent parts of thedevice'are in closed in a suitable casing; thatshown for the purpose being denoted int-a general way by 2 and beingtapered somewlmttoward top, the upper portion heing reduced as at 3 andprovided with an upstanding neck \Vithin said casing is an expansihleand contractibl member which acts to automati eally govern the valveproper of the devi cc as the valve? and the shell thehody oi which isspacedfrom the body. r the casmg 2, answerssatisfactorily in thisconnection ,said shellrbeing preferably made of comparatively thin metalsuch;asnaluniinum Specification of mum Patent. Applicationflledjtebruary 21, um;

through holes in a disk herein:

Patented Sept. '1; 191 1. s riainmneassfi The mounting andn ode ofoperation of said shell Wlll be hereinafter more Pomted'out.

As shown the casing is connected with the elbow or pipe connection 6 theinner terminal of which is illustrated as externally threaded forconnection with a 'r'adiatoi: .(Not shoavn.) The casing-2 is threadedinto the outer enlarged portioH'Ofs i shew said enlarged portion beiii gfurnished int-e riorly' with a wall or diaphragm '1" having one 01'nvore'ports, as 8 which the interior of the easin 2'is put-intocommunication witlrthe radiator. w

In the construction shown 'zhe'u eer reduced portion of the shell 5iselam'p'ed or fixed to the upper reduced portion'cf the casing 2 andfor this purpose the clampir member 9 may be provided, the body. of

said chomping member being-externally oi cofne form to engage thecorrespondingiyformed adjacent surfaee upon the interior of the headportion of said shell 5 and'to the sumesolidly and firmly againstthe'siniilarlyrconed interior surface of the reduced portion 3 of saidcasing, said clamping-mere her!) having a shank 10- extending upwardlytherefrom and tapped into theneck i of the casing 2.- Fitted into said"neck 4 is the plug *11 having a port 12 therethrough the lower portionof said port beingta xred to present .aseaf for the conicalvalve'l3'provided with a 'downwardly-extendingelon eted stem 14. T hevalve-seat plug 1-1 is held rrniy in piece by the plug lfi-providedWithan enlarged .manipulatlilghead 1C- peripheraliy rou 1 ened' tofacilitate its operation and titted screwthreading 'into said neck. Theenge ing threads of the plug loand neck s shown are rig-ht handed whilethosehetween the plug 11 and said neck are'left hand 1 so that asgtheplug 15 is rotated to engage 1e companiomplug- 1]., the latter will notbe turned. It will be clear {that the threedi'r'i g of the two plugmight be reversed tiie ohject in view being to h'zgye the threads oisaid twoplugs opposite The clamping member 9 has one or more ports 17therethreugh and the plug 15 also has a sunday; port {dope-m mg totheatmosphere.

It will be'assumed that thefivaive open at which time'it uncove s theport" H.

In this case cold air in the radiator m thm efrom enters the elbowthrough the ports 8 in the wail filily j l tially central bore in theclamping member 9, and encircling said stem below. said clamping memberis the coiled sprin ,19 the outer end of which bears against sair clampsing member While the opposite end engages aeainst acollar 19 on saidstein, said spring exerting a constant tendency to force said 'valveopen which is the normal relation or that which exists when steam is noton so that at such time cold air can treely escape from the radiators.The loweror inner end of the valve stem extends through and is guided inperforations formed approx mately centrally in the Wall 7 and the dish I20 which latter also has holes 21 for the pas sane of the cold air andsteam at the appropriate times. Said disk 20'elosely fits inacouuterbore 22 in the outerportion of the elbow 6 by reason of which itis held se-' surely in place. The stock 23 punched from said disk :20 toform the two holes 21 is bent at right angles to said disk and reducedat the free ends to present shouldered snpplorting or fulcrum lugs forthe two rocking levers- 24. the lower run portiorrot the shell 53 realm;on the short outer arms of said lovers. the" outer ends of which arebent up as at 25 to revent undue lateral movement of said shell.

the inner end of the other lever extends be tween the branches of theforked end thus presenting a simple and compact means by which saidlevers can he crossed. "if-lie branches of said forked lever and theinner end of the other lever are furnished with upwardly bent ears 26which bear agiiinst the under side of the washer 2T free'or loose on thestem 14 and which will hereinafter appear is, adapted to apply ayieldable effeet to the stem 14 in a direction to close. the valve 1.3.

forked lever and through an opening on perforation in the other lever; ltISliQRQdHSN by pinning. to the valve stcurllisthe (llSl or plate 28 andbetween-Hie same and the companion disk-27 is lnterposed the double.

bowed leaf spring 29 which is-stronger than the spring 19 for a reasonthat will hereinafter appear. It should be observed that the distancesbetween the points on said le- The comparatively long innor end ofone ofthe levers is forked, and

It will be nnderstood ,t-hat said stem 14 extends between tbe'hranuhesot the,

'veiisengaged by said shell and the centers of motion of said levers arerespectively much less than the distances between said centers and thepoints at which said levers apply their effects to the valve stem byreason o-Lwh ich a very small amount of expansion of said shell isnecessary to close said valve.

It will be assumed that the radiator with which the c ouplingor elbow His connected, contains no steam; there will of course in such an eventbe cold uorv substantially cold air in the radiator, so that the shell 5will be in its contracted relation, the outer arms of the levers 24being. down and the inner arms thereof being. up by reason of which thespring 1.9 by acting; againshthe collar 19" will .hold the valve 13 openin the manner already described and this relation will 'be n'iaintaintalso, long as there is no steam in the radiator. On the admission of steaminto the radiator a small quantity thereof passes into the casing 2 inthe manner alreadysetforth, where it acts upon the shell 5 to cause thedownward or inward expansion of the same. As the shell thus expands itslower portion will depress the outer arms of the two levers A, the innerarms of said levers being elevated and acting against the disk orplate2? apply an upward thrust thereto whichin turn is transmitted to thestrong sprint 29. and. by the latter yieldingly to the disk or plate ina direction to move the stem H outward to close the valve 13. the partsbeing so proportioned "and timed that; the ualve .litwill not he closedl'irnily against its scat until all the cold a r has been dischargedfrom the radiator and casing. The yield-able etiect applied to the stem14- in a direction to close illuvalve 1-3 is advantageous in thatthereby n11- parts cannot be injured in case there is anyahncn-nialexpansionof the shell 5 as in such a case, the spring 25) willbe. further compressed without possibility of. injury even thong .thevalve 13 be solid against lie seat.

What I claim is l. A device of the class di'iscribed, comprisingaliasing; provided with a part having a portopening to atmosphere; avalve cooperating with said port, a-heatexpansible shell in said casing,a pair-of crossed le-'ers the outer'portions of which are op- .cratableby said shell on the expansion th cria f lsaid levers being supportedfor rocking indvement between their ends, and neans engageable by theinnerportions of said lorers, for oh I in}; the valve.

2. Adevice .ofthis class described, com- .prisingarasing provided with apart having aport ppi-ni'ngto atmosphere, a valve ,)iperating with saidport, a heat-expair sible shell in said casing, a. pair of levers theinner portion of one of which has a. fork,

A h mm: portion of the. other lever extendlWWI: the branehes of saidfork, the *r pm! ions of said lev ers being operatable said shell on theexpansion thereof, said levers being supported for rocking motionbetween their ends, and means engageable by tilt inner portions of saidlevers, for closing the vnive on the expansion of said shell.

device of the described, com- :3. A prising a casingprovided nith a parthaving port opening to atmosphere, a valve in said casing, forcontrolling said port, spr'ng mes s acting against the valve andotinstsntly to maintain the same 1: beat expansibie sheii fastened insaid easing, and mechanism imlnding spring means, for yieldingiytransferring the motion of the free portion of said shell to said valvein a direction to close the latter, on the expansion of said freeportion, said last mentioned spring means being of greater tension thansaid first mentioned spring means and both said spring means beinginclosed by the casin In testimony whereof I afiix my signature inpresence of two witnesses.

CARL H. PETERSON. Witnesses:

HEATH SUTHERLAND. F. E. ANDERSON,

